UISearchcontroller搜索栏委托不起作用

问题描述

class PlaceSelectorViewController: UIViewController, GMSAutocompleteResultsViewControllerDelegate, UISearchBarDelegate {

我包括了搜索栏委托

searchController?.searchBar.delegate = self

我已经设置了代表。

但是方法

func searchBarCancelButtonClicked(_ searchBar: UISearchBar) {
    stopHighlight()
}

不会发生。

Delegate设置正确，并且 stopHighlight（）是实函数

Delegate has set properly and stopHighlight() is a real function

推荐答案

使用 viewdidload 方法使 searchbar 的委托。 / p>

Make delegate of searchbar in viewdidload method.

 override func viewDidLoad() {
            super.viewDidLoad()
            searchBarCustom.delegate = self
       }

，也可以在情节提要中将其设置为

or you can set it in storyboard as

-因此，代表将呼叫为

 func searchBarCancelButtonClicked(_ searchBar: UISearchBar) {
        print("searchBarCancelButtonClicked")
    }

编辑：
对于 UISearchController

var searchController: UISearchController!
func configureSearchController() {
        // Initialize and perform a minimum configuration to the search controller.
        searchController = UISearchController(searchResultsController: nil)
        searchController.searchResultsUpdater = self
        searchController.dimsBackgroundDuringPresentation = false
        searchController.searchBar.placeholder = "Search here..."
        searchController.searchBar.delegate = self
        searchController.searchBar.sizeToFit()

        // Place the search bar view to the tableview headerview.
        tblSearchResults.tableHeaderView = searchController.searchBar
    }

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